[erlang-questions] Exporting OTP types

Juan Jose Comellas <>
Fri Oct 19 17:25:25 CEST 2012

There are several OTP modules where the types returned by exported
functions are defined but not exported themselves. An example of them are
the following types from the supervisor module, though there are serveral

-type startlink_err() :: {'already_started', pid()} | 'shutdown' | term().
-type startlink_ret() :: {'ok', pid()} | 'ignore' | {'error',

Would it be possible to export them? Would a patch that does this be

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